350-601 Network Practice Question
An engineer is troubleshooting BGP EVPN control plane. They issue 'show bgp l2vpn evpn' and see Type-3 routes but no Type-2 routes for any VNI. Which condition is most likely?
⚠ Common exam trap
Cisco often tests the distinction between control-plane-generated routes (Type-3) and data-plane-triggered routes (Type-2), trapping candidates who assume both route types appear simultaneously upon VNI configuration.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The VTEP has not learned any MAC addresses
Type-3 routes (Inclusive Multicast Ethernet Tag routes) are generated automatically when an EVPN VNI is configured, regardless of MAC learning. Type-2 routes (MAC/IP Advertisement routes) are only generated after the VTEP learns MAC addresses from data-plane traffic or from local endpoints. The absence of Type-2 routes with Type-3 present indicates the VTEP has not yet learned any MAC addresses for that VNI.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The VTEP has not learned any MAC addresses
Why this is correct
Type-2 routes carry MAC/IP information. Without any MACs learned, no Type-2 routes are generated.
- ✗
The overlay VNI is not mapped to a VLAN
Why it's wrong here
If VNI is not mapped to a VLAN, Type-3 routes would also not appear for that VNI (but Type-3 may be seen for other VNIs).
- ✗
The BGP neighbor is not from the same AS
Why it's wrong here
BGP neighbor AS mismatch would prevent all route exchange, including Type-3.
- ✗
The EVPN address-family is not enabled
Why it's wrong here
If EVPN address-family were not enabled, no EVPN routes (including Type-3) would be seen.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.